Fmoc-N-Me-D-Phe(3-CN)-OH
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Fmoc-N-Me-D-Phe(3-CN)-OH

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Category
Fmoc-Amino Acids
Catalog number
BAT-008514
Molecular Formula
C26H22N2O4
Molecular Weight
426.46
IUPAC Name
(R)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-3-(3-cyanophenyl)propanoic acid
1. Kinetic Study of the Gas-Phase O(1D) + CH3OH and O(1D) + CH3CN Reactions: Low-Temperature Rate Constants and Atomic Hydrogen Product Yields
Kevin M Hickson, Jean-Christophe Loison J Phys Chem A. 2022 Jun 23;126(24):3903-3913. doi: 10.1021/acs.jpca.2c01946. Epub 2022 Jun 10.
Atomic oxygen in its first excited singlet state, O(1D), is an important species in the photochemistry of several planetary atmospheres and has been predicted to be a potentially important reactive species on interstellar ices. Here, we report the results of a kinetic study of the reactions of O(1D) with methanol, CH3OH, and acetonitrile, CH3CN, over the 50-296 K temperature range. A continuous supersonic flow reactor is used to attain these low temperatures coupled with pulsed laser photolysis and pulsed laser-induced fluorescence to generate and monitor O(1D) atoms, respectively. Secondary experiments examining the atomic hydrogen product channels of these reactions are also performed, through laser-induced fluorescence measurements of H(2S) atom formation. On the kinetic side, the rate constants for these reactions are seen to be large (>2 × 10-10 cm3 s-1) and consistent with barrierless reactions, although they display contrasting dependences as a function of temperature. On the product formation side, both reactions are seen to yield non-negligible quantities of atomic hydrogen. For the O(1D) + CH3OH reaction, the derived yields are in good agreement with the conclusions of previous experimental and theoretical works. For the O(1D) + CH3CN reaction, whose H-atom formation channels had not previously been investigated, electronic structure calculations of several new product formation channels are performed to explain the observed H-atom yields. These calculations demonstrate the barrierless and exothermic nature of the relevant exit channels, confirming that atomic hydrogen is also an important product of the O(1D) + CH3CN reaction.
2. Atmospheric chemistry of CF3CN: kinetics and products of reaction with OH radicals, Cl atoms and O3
Mads Peter Sulbaek Andersen, Joanna Ohide, Theis I Sølling, Ole John Nielsen Phys Chem Chem Phys. 2022 Jan 26;24(4):2638-2645. doi: 10.1039/d1cp05288h.
Long path length FTIR-smog chamber techniques were used to study the title reactions in 700 Torr of N2, oxygen or air diluent at 296 ± 2 K. Values of k(Cl + CF3CN) = (2.43 ± 0.33) × 10-15 and k(OH + CF3CN) = (4.61 ± 0.34) × 10-15 cm3 molecule-1 s-1 were measured. There was no discernible reaction of CF3CN with O3 and an upper limit of k(O3 + CF3CN) ≤ 7.9 × 10-24 cm3 molecule-1 s-1 was established. The IR spectra of CF3CN and CF3CF2CN are reported. The atmospheric lifetime of CF3CN is determined by the reaction with OH and is approximately 6.9 years. Reaction of CF3CN with Cl atoms in a chamber study gives (Z-) and/or (E-) CF3CClNCl and CF3C(O)Cl as major primary products. Under environmental conditions, the OH radical initiated oxidation gives COF2 in a yield of (96 ± 8)%. The global warming potential for CF3CN is estimated as 1030 for a 100 year time horizon.
3. Functional MXene Materials: Progress of Their Applications
Xiuqin Li, Chengyin Wang, Yu Cao, Guoxiu Wang Chem Asian J. 2018 Oct 4;13(19):2742-2757. doi: 10.1002/asia.201800543. Epub 2018 Aug 23.
Nowadays, two-dimensional materials have many applications in materials science. As a novel two-dimensional layered material, MXene possesses distinct structural, electronic, and chemical properties; thus, it has potential applications in many fields, including battery electrodes, energy storage materials, sensors, and catalysts. Up to now, more than 70 MAX phases have been reported. However, in contrast to the variety of MAX phases, the existing MXene family merely includes Ti2 C, Ti3 C2 , (Ti1/2 , Nb1/2 )2 C, (V1/2 , Cr1/2 )3 C2 , Nb2 C, Ti3 CN, Ta4 C3 , V2 C, and Nb4 C3 . Among these materials, the Ti3 C2 Tx MXene exhibits prominently high volumetric capacitance, and the rate at which it transports electron is suitable for electrode materials in batteries and supercapacitors. Hence, Ti3 C2 Tx is commonly utilized as an electrode material in ion batteries such as Li+ , Na+ , K+ , Mg2+ , Ca2+ , and Al3+ batteries. What is more, Ti2 C has the biggest specific surface area among all of these potential MXene phases, and therefore, Ti2 C has remarkably high gravimetric hydrogen storage capacities. In addition, Ti2 CO2 materials display extremely high activity for CO oxidation, which makes it possible to design catalysts for CO oxidation at low temperatures. Furthermore, Ti3 C2 Tx with O, OH, and/or F terminations can be used for water purification owing to excellent water permeance, favorable filtration ability, and long-time operation ability. This review supplies a relatively comprehensive summary of various applications of MXenes over the past few years.
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